INTRODUCTORY 9 



rapidly about and traversing- the liquid medium in which 

 they are, in every direction. Their movements are not 

 simple; the Infusoria guides itself, while swimming about; 

 it avoids obstacles ; often it undertakes to force them 

 aside ; its movements seem to be designed to effect an 

 end, which in most instances is the search for food ; it 

 approaches certain particles suspended in the liquid, it 

 feels them with its cilia, it goes away and returns, all the 



AlTiatrionSpW v enclosing o centiosoroft 



(NocWus 

 C^omafm. 

 Nutleus Actomoffm. 

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VacuoU 



FIG. I. The Cell 



while describing a zig zag course similar to the paths of 

 captive fish in the aquariums; this latter comparison 

 naturally occurs to the mind. In short, the act of locomo- 

 tion as seen in detached Infusoria exhibits all the marks 

 of voluntary movement." In this statement, Mr. Binet 

 called them Infusoria. This animal has organs and 

 acts precisely in the same manner as any other animal. It 

 feels objects to decide whether they are good for food. 

 It has a will, judgment and discretion, just as we have. 

 It can decide for itself whether any particular substance 

 is fit for food. It can exercise discretion in the matter in 

 the same way that we do in hunting for something to eat. 

 The scientists of today do not consider the cell an 

 intelligent being. They claim that he does not show 

 anything but irritability. This word has caused much 

 confusion and is practically meaningless as far as I can 



